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At 06:20 PM 3/30/99 -0600, stuart wrote:
>In regards to hardware, does anyone know how much the new ultra-wide,
>ultra-fast scuzzi's improve performance? I have a P-2 450 with a 10,000 rpm 9
>gig Seagate Cheetah with Adaptec's fastest scuzzi, and it seems that TS 4.0
>runs all my programs well. I have Advanced Get RT running as well as TS 4.0
>I have at least nine charts running in AGet and 5 windows in TS with several
>charts in each window with dual monitors through Win 98 with no delay. I use
>BMI sat, and as a means of comparison with posts previously, I got 3722 ticks
>on DSP9M today (3/30).
>
>Midnight updates through BMI take about 10 minutes to stop working the hard
>drive. It seemed to take about as long with my former 200 mghz with similar
>scuzzi. I only run 190 symbols, but I store 5,000 days of each, including
>all tick data. Would I see the hard drive work less with dual processors,
>dual HD scuzzi's, in RAID array, or is the advantage mostly in backup on the
>second drive?
>
>SB
The Cheetah is the fastest drive currently available. The very fastest
drive interfaces are the optical ones. Then differential SCSI, which is
twice as fast as single-ended SCSI. Frankly, though all this raw power is
nice, and the differential price to get the latest and greatest is quite
small, most accesses are sequential. With sequential access, the existing
disk caches do a good job of insulating you from the failings of the hard
disk system.
I doubt that the time it takes to do your midnight is disk drive dependent,
so further improvements in that direction will probably not show benefits
wrt Omega thrashing the disk.
Allan
"Nothing that I can do will change the structure of the universe. But
maybe, by raising my voice I can help the greatest of all causes --
goodwill among men and peace on earth." - Albert Einstein
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